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Nature Reviews
(9) In comparison to the brain, resting muscle consumes about 1 ml O2 per minute and per 100g of tissue, but can increase up to 50-fold when contracting during exercise to enhance performance
More on this: Vegan and vegetarian sources of B12 To diagnose a vitamin B12 deficiency, doctors A doctor may order blood tests if they suspect a person has a vitamin B12 deficiency, including a complete blood count and tests to check levels of B12 and folate in the blood
doi:10.1016/j.ophtha.2011.09.005
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